Originally Posted by
632 Regal
I was thinking M1 0w40. Reading at e31club some have tried thick stuff and it made lifter click worse (mine dont click). I am going to tap the sending unit and see what the pressure is actually at. I'm going to most likely check out the upper end and loctite the banjo's while I'm at it too.
Cant wait to see how clean that area is
When choosing oil, use the smallest "low number" you want but NEVER lower the upper number. I have an engine that requires 10w50. Someone suggetsted 10w30, a very common/popular weight. No way. My engine is not designed for that.
The engineering, internal clearances, parts expansion and circulation were set up to REQUIRE a certain weight oil over a certain range of tempuratures. I have to use 20w50 in lieu of 10w50 because I can't get 10w50 anywhere. On cold days I block the oil cooler inlet and watch the oil temp to make sure it's where it should be..
If your manual calls out a lower weight oil like 10w40 great, use 0w40 if you want, it's good for cold weather circulation but you NEED that 40 weight for high temp areas around the valve stems.
Spasso
530iT, 525 5-speed , 328is.